Fast Fernet

Description

At a blink, I lost my flag

chal.py output.txt

Solution

• In the python file, at the end of line 4, theres a comment which says secret_keyword=zoom

• Using zoom as the key_str, we get an error saying Fernet key must be 32 url-safe base64-encoded bytes

• So the key must be zoomzoomzoomzoomzoomzoomzoomzoom

• Using script.py, we get the flag.

$ python3 script.py
FLAG:  b'pesu_ec{Z29vZF9qb2JfY29tcmFkZQ==}'

FLAG

pesu_ec{Z29vZF9qb2JfY29tcmFkZQ==}